Chromatic chase for printing presses



April 1 1924.

J. A. WHITTINGTON CHROMATIC CHASE FOR PPINTING PRESSES 5 Sheets-Sheefi 2 Filed Dec. 1921 @W V I Ql to'cneq Patented Apr. ll, i224.

UNITE STATES means;

r'rnnr orF cE.

CHR-OTVIA.TIC CHASE F03 PRINTING PRESSES.

Application filed December 8, 1921. Serial No. 520,778.

To all whom it may concern:

Be it known that .l, JOHN A. Wrrrrrinorow, a citizen of the United States of Americe, and a resident of Atlanta, State of Georgia, have invented certain new and useful Chromatic Ghases for Printing Fresses, the principles of which are set forth in the following specification and accompanying drawings, which disclose the form of the invention which I now consider to be the best of the various forms in which the principles of the invention may be embodied.

This invention relates to chromatic print ing devices, and consists of various improvements on the printing chase disclosed in my Patent No. 1,292,190, dated January 21. 1919.

This entire chase is adapted as to its principal elements to he set in place alongside or in the midst of the usual type chases in the various types of printing presses, without alteration of the construction or operation of the press itself for which the chase may be particularly designed.

The general object of the present invention is to make more nearly perfect the color-printing chaseof my said prior patent, including a reduction of the number of parts, movable and stationary.

As in my said prior patent, the chase includes. among other features, an oscillating support for type which is provided with a fountain for inking it a different color from the rest of the type in the press, the latter being usually black. The chase preferably also includes, as before, a support for type which is inked by the inking roller of the press.

One of the objects of the invention is the provision of improved means for tripping or operating the oscillating support for the color-type, and providing for yielding action in said means.

Another object is the provision of improved means for removably mounting separate type characters on the type supports.

Another object is the provision of improved means for mounting the black-type support in the chase and providing for the convenient removal and replacement of such support.

Another object is the provision of improved means for mounting the color-inking means within. the chase, for moving it from the color-type before the latter is moved to printing position, and toward the colortype after the latter has been moved to its normal inking position.

lVith the foregoing and other ohjectsin view, which will be apparent as the description proceeds. the invention resides in the construction and arrangement of parts here-- inafter. described and claimed.

Of the drawings,

Figure 1 is a plan of the chase (somewhat smaller than actual size), showing the oscillating color-type 4:9 as having been swung (by the operation of the impression surface of the printing press of which it is to form a part) into printing position. in the plane of black type 27 of the chase;

Fig. 2 is a like plan, but with color-type d9 in normal or inking position (at right angles to its printing position of Fig. l) and with the black type 27 of Fig. 1 removed from the device in order to show the colorink fountain 7 6;

Fig. 3 is a plan like Fig. 2 but with the inkfountain 76 removed, and showing its oscillating supporting plate 84;

Fig. 4; is a side elevation, with the righthand one of the two outside boxing members 21 removed to show the construction of the principal elements including the main frame 14 and the tripping frame 17, the latter being a part which is operated by the impression surface of the press to swing the oscillating color-type to printing position;

Fig. 5 is a slightly enlarged right end view of the chase of Fig. 4: with one 1002; member 21-removed, showing in section one of the two tripping levers 56 which are located at opposite ends of the device and which operate between the oscillating colortype 49 and its tripper frame 17:

Fig. 6 is an enlarged end view like Fig. 5 but with the tripping lever 56 thereof entirely removed from its connection with shaft 39 which carries oscillating colortype 49;

Fig. 7 is an enlarged cross section on line 7-7 of Fig. l, showing the seating of black type 27 in the chase, and showing also the equalizing levers 71 which keep tripperframe 17 level. the latter being shown in all the figures as the element which is operated by the impression surface of the printing press to swing the color type into its printinnposition of Fig. 1;

Fig. 8 is an enlarged cross section on line 88 of Fig. 2, showing black type 27 of the chase in fixed printing position and showing 1 ,esen

swinging color-type 49 in inking relstion with the color-inking means;

Fig. 9 is a portion of a. longitudinal section on line 99 of Fig. 6 (compare Fig. l), showing the interrelated construction of the principsl elements of the chase, which construction is duplicated at the two ends of the chase; and

Fig. 10 is 2. cross section of the ink-fountain 76 with inking pad 78.

For cleerness, Figs. 1-9 have been made to correspond with the figures of my ssid prior patent.

The stationary main frame or body 0- device comprises base or bottom plate (Fig. 4:) inside the two box-members 21 and having vertical flanges extending longitudinally of the chase and along; the side edges thereof. 14 also has vertical flanges 16 extending transv rsely of the chase; these flanges 16 being located near to and spaced from the ends of said base 14 (Figs. l end 9). As shown (Figs. 1-3), base 1% is of rectangular form, but may be of other shape. This base 14 with its vertical flanges 15 and 16 constitutes e main frame which supports the entire apparatus of the chase including the lateral boxing members 21 which constitute the sides of the chase.

A tripping frame or tripper 1'? (Figs. 1-9) of the same shape as base 14 fits telesco sicsll v over vertical transverse flanges 16 of base 14. Said tripper 1'? has vertically dependingtransverse flanges 18 6 and 9) near its ends which slidsbly overlap he outer sides of flanges 16 of hose 1 .1. ends of rectnngulsr tripper 17 9) project beyond its vertical depending flanges 18, and are provided with dowuwerdl; facing shoulders 19 extending to the inner wall of box 21. Tripper 17 is thus slidable on main frame 14.- upwardly and downwardly, inside box 21. The top surface of tripper 1'? may carry any suitable means for making a blackinl impression on the sheet to be printed. Thus, shown (Fists. 1%, 64)), tripper 17, in the form of a. four-sided frame, has n. border portion 20 which will print any suitable block border around the impression mode by the block and the color type of the chose, and may have means for holdin re n'iovsble type or may have lettering cut in it or electrotype supported on it.

Main frame 142. and tripper 17 above it, are encased by a pair of ti-shaped boxing members 21 (Figs. 1. 3, e, 6, 7, 9) fitting base 14 from the opposite ends. The ends of members 21 (Figs. 1 and 4:) abut one enot-her at opposite sides of the chase intermediate its ends. and are secured to vertical longitudinal flanges 15 of main frame 1% bv screws The cues of frame-base 1 1 may have pins 23 5) to engage the bot;- members 21 and assist in holding them in Said members 21 thus A hon or lateral well within wliicl i c a is vertically reciprocal 0".

5521116 1 1; and said box or ig also encloses the worki. g rrnme e the sides and bus-e 1 7, line T T ig. Type support extends "udinallv f the chose to carry the block type 27 ig. 1). The ges 16 are provided with in. their upper edges w ich receive the ends longitudinal type support .41. Support 24. (Figs..1, 7, 8 and 9) can have suitable type thereon, us an electrot pe or cut, but, as shown, it is provided with means for receiving separately removable t pe characters 27, as follows. Si'ipport has longitudinal slots 26 (Figs. 1 and of inverted l' shaped cross section, and the type characters 27 (Figs. 8 and 9) have corr spending -shaped lugs 28 which slide in said slots 26 into locking position in support 241-. Slots 26 have openings 29 (Figs. 1 and 9) at one end to permit insertion and removal of the separate type cheractors 27, whereby various words can be set up es desired, and the printing'b r the chose Support can be altered from time to time.

also is removable as shown, so that it can be removed and replaced by another piste of the shape but carrying e. different type make-up or having an electrotype or cut thereon as disclosed in my suid prior t ln order to reniovsbly secure support in place, its ends are seated in reccsses (Figs. 1, 7 8 end 9) in transverse flanges 16 of main frzune 1 1. The sides of support 2% are beveled at 31 (Figs. 7 and 8). Que end of each recess 25 in transverse flange 16 of main frame 14- is provided with on undercut bevel 30, adopted to receive bevel 31 of support 24-. A catch 33 (Figs. 2, 7 and is provided (one at each end of support at the right-hand end of recess 25 (Fig. 7). Catch 33 engages the side of support 2 1 opposite to its beveled side 30, and holds support 242 down in place. 'Euch transverse flange 16 of main frame 1% has a.

slot 32 (Plus. 2 and 7), which intersects the end of recess 25, as shown. Catch 33 1s located in this slot 32, the catch being pivoted by pin 3st Fig'. 7) extending through flange 16. Catch 33 has a V-shsped ear 35 (Figs. 2, 7 and 8) projecting to snap over bevel 31 of piste 24;. A spring 3'? forces ear 35 against bevel 31 the sprin being seated in a hole 36, Fig. 7, drilled into flange 16 of main frame 1 1). Eur 35 is beveled at top and bottom as shown. Said spring 37 per= mounted on main.

mits said ear 35 to yield in snapping support 24 in or out of'position in recesses 25 of flanges 16 of .lrame 14. VJhen the lefthand beveled side 31 of support 24 is insert" ed under bevel (Figs. land 8) and the right side of support 24 is pressed down. said right side in pressing down on the upper bevel of ear 35 will tilt the right-hand side of catch 33 down. Thereupon the bevel of the right side of support 24 will engage under the lower bevel of ear 35. and force the right-hand part of catch 33 down against spring 37 into the locking position of Fig. 7, where the left-hand portion of the catch is in engagei'nent with the lower art of sun )ort 24. Reverse o oration 381- inits removal of support 24 with equal facility, if desired to replace support 24 or to obtain access to the color-inking means below it. Catches are contained within reccsses 32 of transverse 16, thereby providin a'coinpact and efficient arrangement (Figs. 1 and i").

Oscillating color-type bar or carrier 38 (Figs. 2, 3 and 8) is disposed longitudinally of the chase alongside support 24 for black type 27 (F ig. 1). It carries type which can be inked in red or other color, character or composition distinct or different from the rest of the type. in the chase and in the rest of the printing press. both of which are usually inked in black. Carrier 38 has a swinging or oscillating movement transversely of the chaseybeing mounted on a rod or shaft 39 (Fig. 8) extending longitudi nally of the chase and journaled in vertical transverse flanges 16 of main frame 14. Carrier 38 is pinned to shaft 39 to oscillate therewith. Its intermediate portion is recessed. as at 40 (Fig. 8), to receive a spring 41 coiled around shaft 39. Upper end 42 of spring 41 engages carrier 38 and lower end 43 is located in longitudinal flange 15 of main fran'ie. 14. to swing carrier 38 to its normal or inking position shown in Figs. 2, 3 and 8. and holds it in that position save when said carrier is swung to and held in its printing position of Fig. 1.

Carrier 38 carries color-type holder 45 (Figs. 13 and 8). Holder 45 maybe a die-casting, and removable for changing the type or substituting another holder. Holder 4.5 has a portion 46 (Fig. 8) fitting a longitudinal groove 47 in the face of carrier 38. screws48 carried by carrier 38 clamp rib 46 of holder 45 in groove 4'7. Said screws 48 when loosened permit holder 45 to be removed. Holder 45 has separate removable type characters 49 therein (Figs. ].3 and 8), although it may have an electrotype or out thereon. Type characters 49 have T-shaped lugs 50 (Fig. 8) which slide longitudinally in a groove 51 in holder 45. The ends of holder 45 and its slot 51 extend Thereby sprint 41 tends.

to vertical transverse flanges 16 of main frame 14 (Figs. 1+3) so that said flanges 16 normally (lose the ends of said groove 51 in holder 45 and hold the type in place. hen holder 45 is removed from carrier 38, the ends of groove 51 are opened. and the colortype characters 49 can be readily slid into and out of said groove through the ends thereof. thus enabling the words or characters in holder to be changed at will. Carrier 38'has'huffers 52 (Figs. 1-3 and 8) to strike the inside wall of tripping frame 17 (F ig. 8) wnen the carrier is swung to the printing position of Fig. 1. locate carrier 38 in its inking position. Of course, any suitable printers devices can be used to hold the type in the desired position in its line.

The construction for swinging the carrier 38 of coloi'-type 49 from its inking position of Fig. 8 to its printing position of Fig. 1 is a follows. Two disks 53 (Fig. 6) are secured (keyed) to the opposite ends of oscillating shaft 39 on which carrier 38 is fixed for oscillation thereby. Flanges 18 vertically dependent from tripper frame 17 have recesses 55 receiving said disks 53. Disk has a. crank pin' 54 mounted on it eccentric-ally and projecting outwardly from it. Shaft 39 is swung up to type printing position by depression of tripper 17 by engagement of the impression surface of the printing press with any of the four sides of the tripper 17 when in the form of afoursided frame as shown. Shaft 39 is swung ba k to normal (inking) position by spring 41. Tripping levers 56 operate between tripper 17 and disks 53, and (Figs. 5 and 6) each lever 56 has an aperture 57 receiving crank pin 54 of the disk. Levers 56 are disposed at opposite ends of the chase just inside casing walls 21 (Figs. 9 and 5) and between said walls and vertical transverse flanges 18. The vertical disposition of levers 56 is between base-plate 14- (Fig. 9) and the overhanging shoulders 19 of tripper 17. (Frank pin 54.011 disk 53 is raised (Fig. 8) when carrier is swung by spring 41 back to normal (inking) position. thereby raising the end of lever 56 which is engaged by pin 54 (Fig. 5). while the other end of lever 56 slides on base-plate 14. Pressure on lever 56 by downward movement of tripper 17 depresses pin 54, to turn shaft 39 and swing carrier 38 to printing position to bring color-type 49 into the plane of the black type 27 of plate 24 (Figs. 1 and 8). Each lever56 has yieldable means thereon (springs 64. 65. Fig. 5) for compression by tripper 17 and involved in the following construction. Each of the two levers 56 (Figs. 5 and 9) has an upper longitudinal recess 58 receiving a pressure member 59. The latter isflguided and limited in its upward movement in recess 58 by awpair of Steps 44 i ber 59 has sockets 62 below the screw-head apertures 61, and has two sockets 63 between the two soclrets 62, and in these soclrets 62 and 63 are seated the coiled expansion springs 64.- and 65. vSaid springs are confined between pressure member 59 and lever 56 to tend alternately to resist and raise pressure member 59 with te desired force. Springs 64 and 65 also distribute the pressure between pressure member 59 and lever 56 throughout the length of the pressure member. The latter (59) has an opening 66 (Fig. 5) intermediate its ends, in which a plunger 67 is slidable upwardly and downwardly. A. coiled expansion spring 68 is confined in a secret 69 in plunger 67. The upper end of plunger 67 has a head or flange 70 (Fig. 5) which seats on pressure member 59 and thereby limits the relative movement of plunger 67 and pressure member 59. Springs 68 raise plunger 67 to bring plunger-head 70 against shoulder 19 of tripper 17 (Figs. 5 and 9). -With this arrangement (Fig. 5), pressure member 59 is raised by considerable pressure from springs. 64, 65. But the upward movement of pressure member 59 is limited by the heads of screws 60 in lever 56. The two plungers 67 (at opposite ends of the chase) in being raised by the light springs 68, will raise tripper 17 to its normal lifting position above level of black type 27, in the path of the impression surface of the printing press. Thus, during the first movement of tripper 17 when depressed (Fig. 5) by the impression surface of the printing press, tripper-shoulders 19 (Fig 9) will depress plungers 67 until their heads 70 seat on pressure member 59. Then the two pressure members 59 are depressed against springs 64 and 65. Thus, during the first part of the depression of the tripper 17, it acts only against plungers 67 and springs 68. But after heads 70 of plungers 67 seat on pressure members 59, the latter are depressed until the downward force exerted by springs 64:, 65 on levers 56 is increased sufficiently to cause levers 56 to move down. This provides (Figs. 5 and 8) for a slight depression of tripper 17 before levers 56 are depressed to turn color-type carrier 38 to printing position; and this arrangement is utilized in connection with the operation of the color-inking mechanism to be described. Furthermore, the mounting of pressure members 59 on levers 56 (Figs. 5 and 8) provides for yieldingly imparting the pressure from plungers 67 to levers 56.

When levers 56 are depressed, they carry wlth them the crank pins 54 which turn insane-a disks 53 shaft 39 and swing color-type bar 38 to printing position.

Means are provided to compel tripper 17 to move downwardly and upwardly in a level plane, thereby preventing an uneven or tilting position of the tripper when one of its frame sides is engaged by the impression surface (as a cylinder) of the printing press. A pair of levers 71 is located at each end of the chase (Figs. 6, 7 and 9). Each pair is located in the vertical space 9) between a vertical transverse flange he main ame and a vertical transverse 18 .of the tripper 17. Levers 71 are aced below an overhanging shoulder 73 flange 16 (Figs. 9 5). Each lever 71 of each pair is fulcruined at 72 (Fig. 7) intermediate its ends and to flange 16. The adjacent ends of the two levers 71 which project toward one another have intermeshing teeth 74- 7), which constrain the two levers to swing simultaneously on their pivots 72. Levers 71 are arranged to be swung by downward movement of tripper 17; the ends of levers 71 being connected by pins 75 to flange 18 of the tripper (Figs. 5, 6 and 7). Thus, when the impression cylinder of the press engages one side of tripper frame 17, the end of lever 71 next to that side is depressed by the downward movement of the tripper, and such swinging of such lever 71 causes its engaging lever 71 to swing and thereby pull down the opposite side of tripper 17, so that the entire tripper frame is kept level in its downward movement; and likewise when, later on, the tripper is moved upwardly to its normal position above type level. The pins 75, which are screwed in'tripper 17 and enter lever 71 (Figs. 6 and 7), hold tripper 17 against removal, owing to the location of levers 71 below shoulders 73 of vertical transverse flange 16 of the main frame: although, for making repairs, the removal of screws 75 will permit tripper 17 to be lifted out of the chase.

The means for supplying colored red) inlr o oscillating color type 49 includes an elonated ink fountain or reservoir 76 (Figs. 8, 9 and 10) disposed longitudinally of -e chase below black type holder 24- (Figs. 8 and The long side of fountain 76 which is nearest to oscillating type-carrier 38 (Fig. 8) has a longitudinal channel 77 hold an ink pad 78. preferably composed of felt (Fig. 10). partition between fountain 76 and 78 has apertures 79 which permit the passage of ink from fountain 76 to the pad 78 from which the ink passes to color type as when bearing against the type as in Fig. 8. Fountain 76 has an upper filling opening 80 (Fig. 10). A stopper 83 snaps into opening 80 to close it (Figs. 10 and 2). Stopper 83 is carried at the end of spring arm 81 pivoted at 82 to thetop of fountain 76. The. fountain is filled by removal of black type support 2i above fountain Y6 and removal of stopper 83.

The entire inking mechanism mounted for swinging movement in a support 84 (Figs. 8 and 2). The long side of support 84; which lies adjacent to type-carrier 38 (Fig. 8) is pivoted on rod 85 extending longitudinally of the chase. Support 84; is shown as a sheet metal stamping and is bent around rod 85 at 86. Rod 85 has its ends secured in the two end flanges 16 of the main frame (Fig. 9). The opposite or swinging side of support 84: (Fig.

8) has a flange 8T bent upwardly to assist in holding fountain T6 .in place (Figs, 2, i) and 8). When support ea swin 's upward on its pivot 85, pad 78 swung toward oscillating carrier 58 and color type 49 there on. lVhen support 8% is swung downward on the pad T8 is swung away from type ell). Fiupport S-Ll has posts 88 extending upward vertically froi'u its opposite ends (Figs. 2, 3 and These posts also assist in holding fountain 7G in place. The ends of channel 77 holding pad 78 project longitudinally of the chase and beyond the ends of fountain 76 and bear against posts 88 to further assist in holding the inking mechanism in support 84;. The ends of fountain 76 have pins projecting therefrom (l? 2 and which extend to one side of posts 88, so that said posts rise between pins 89 and channel 77. Thus the fountain and pad structure of Fig. 10 may be put in place on its support 8%, and removed therefrom. by the guiding of pins 89 and channel '77 on opposite sides of supportposts 88.

The above inker is moved towaid oscillai'zing color type 49 by two springs 90 which engage the of the inker near opposite ends thereof (Figs. 2, 3 and 8). Each spring 00 is confined between posts 88 of fountain support 8% and posts 91 secured to the main frame lat as by screws 92 (Figs. 8 and l). Said springsupporting posts 88 and 91 have studs 93 which enter in the end of spring 90 and position the springs. Normally. these springs 90 hold pads-T8 against color type 49. Tu the movement of the inker toward the color-type, the posts 88 bear against channel 77 (Figs. 2 and 8).

The inker positively swung against springs 90, away from color type it) by the initial depression of tripper 17., and in such way to avoid swinging of type 49 while engaged by pad 78, as follows. Pins 94; project from posts 84: at the ends of the inker 8). These pins 94 project through openings in vertical transverse end flanges 16 of the main frame, and also through oi ieninns 95 in eqi'ializing' levers 71 (Figs. l, 6 and Pins 94 project into recesses or slots 96 in vertically-depending flanges 18 of tripper 1? (Fig.6). Said,

recesses 96 are enlarged at the bottom of the tripper flange, to form shoulder-corners 97 which normally bear on pins 94 (Fig. 6). The pins '94; normally engage the corner of shoulder 97 so that as soon as tripper 14 (Fig. 6) begins to move downward, pins M are forced to the left (Fig. 6) against springs 90 (Fig. 8). The continued downward movement of the tripper results in recess 96 coming down around pins 9st without causing further movement of said pins. But the initial movement of the tripper, moving pinstla, has moved posts 88 to which they are secured and has swung support 84, thereby swinging fountain 76 and pad 78 away from color type 49.. This operation is permitted while (Fig. 5) tripper 17 is depressing plungers 67 and before the heads thereof have engaged pressure members 59. 'lyp-e-carrier 38 is not started swinging to printing position until heads 70 of plungers 67 have engaged pressure members 59, which is after the inker has been swung away from the color type as described. The above construction and arrangement provides for a quick withdrawal of pad 7 8 from type 49 during the initial depressing of tripper l7 and before type. carrier 38 is started in its swing toward printing position by the depression of pressure ,members 59 and levers 56.

The inker hereof is particularly designed for a chase adapted for use with reciprocating flat bed presses in which the bed reeiprocates at a rate from a few hundreds to several thousands per hour. The color ink used is preferably heavy and the high speed of the bed is usefully employed in assisting the heavy ink to pass out through upper holes 79 of fountain 76 to the pad, even when there is only a small quantity of ink left in the fountain. It appears also as if the pressing of the feltpad on the color type movedthe fibers of the pad so as to assist the capillary action and the movement of the press bed in bringing out the heavy ink from the fountain and through the pad to the type, i. e., a sort of kneading or milking action of the pad by the color-type. Preferably, in making the ink pad, the felt should be cut so that the grain of the wool is at right angles to the color type, so that such fibers may act as multiple wicks or teats.

The various parts of the chase shown herein to which detailed reference has not been made may follow in general the chase of my said prior patent. In any design embodying my inventions in this chase, the tripper should be permitted to move down as easily as possible without being permitted to be depressed by the inking roller of the press to cause unnecessary operations at the high speed of printing press operation involved; and to this end the springs should be easy and there should be as little friction of moving parts as far as convenient. Such ease of motion of the tripper is important in that it reduces the printing indentations on the paper by the tripper, which should not be deep enough to show on the back of the paper; for generally the tripper frame is black printer as well as a tripper.

The operation of the chase as a whole is as follows. When the chase is traversed by the inking roller of the press in which it is used, such roller, being made as usual of ayielding composition, will yield at points where it engages with (and inks) the bordering sides 20 or other printing surfaces of the tripper 1''? (Figs. 1-3, 7-9). This yielding is preferably sufficient to prevent operation of any of the parts of the chase, that is, the design of the chase is preferably such that the tripper will not be moved by the inking roller (but only by the rigid impression surface of the press) even to the extent of withdrawing the inl-Ier from the color type as above described, although such action may be permitted. if such action is permitted, there will be two color-inking actions for each color-printing operation, due to the fact that the inking roller of the press will leave the tripper before the latte is depressed by the rigid impression surface of the press which operates tripper 17.

The resistance of springs G l, 65, 68 and ll (and the general inertia and friction of the various parts) may be made sufficient, in combination with the yielding material of the inlring roller, to prevent any depression of the tripper by the roller, especially in view of the short extent of projection shown herein of the tripper normally above type level, with or without sufficient additional rigidity of springs 58 of plunger 67 (Fig. The movement of the inking roller, however, at least will apply the ordinary black inl: of the press to any printing surfaces carried by tripper frame 17, and to any other black-printing surfaces of the chase such as type 27, in common with the like black-inking of the type in the other parts of the press in which my chase is used. When the sheet of paper to receive the printing impression is pressed against the chase by the rigid impression cylinder er platen of the press carrying said paper, tripper 17 will be depressed by the substantially unyielding impression surface of such cylinder or platen.

Thereupon the general operation is as follows. (1) Inn fountain 76 and pad 78 are withdrawn from color type 49 while the latter is at rest in its normal vertical position (Fig. 8), the inlrer being entirely removed from the circular path of swinging movement of the color type before the latter is started in its oscillation to and from printing position. (2) Then type i9 is swung toward horizontal printing position, a part of it moving first across the space just previously occupied by pad 78, and then an opposite corner of it moving across the path (above type level of the press) of the impression surface of the press (Fig. 8), and finally into ultimate printing position at rest in advance of the arrival of the impression surface at such position. (3) Then tripper 17 continues its downward movement until (all in a very short time indeed) it has been fully depressed by the impression surface, this continued movement of the tripper after the color type has reached printing position being permitted by the spring arrangement described. Then the impression surface of the press passes over the space within the four sides of tripper 17 including all the printing surfaces thereon, and the impressions thereof,

41 i J o Jr oi blacn type A! and or color type 49 are printed on the paper carried by the impression surface. (5) Then the impression surface leaves the tripper frame, whereupon spring 4-1 retracts type as to its normal (inking) position, the tripper also being started toward its normal elevated position above type level, the inking pad being held from movement toward the color-type. (6) Tripper 17 continues its upward'movement and just as it reaches normal position, ink pad 78 is swung against color type 4:9 but only just after the latter has reached its position of rest.

During all of these six operations, the equalizing levers 71 (Fig. 7) have been. functioning to keep tripper frame 1'? level irrespective of its changing relations with the imp ession surface of the press, so that there is no tilting or jamming of said frame 17 as the impression surface traverses the frame from one side or end to the other side or end.

lhe details of the are as follows.

(1) During the initial downward move" ment of tripper 17 (which effects the withdrawal of the inlrer from the color type 49), plungers 67 (Fig. depressed against their springs 68 without starting oscillation of the color type, i. 0., without moving pressure members 59 or levi's 56 which. swing the color type. This initial downward movement of the tripper is down to the point where the heads 70 of plungers 67 reach pressure members 59. Meanwhile pad 78 is swung away from the color type and out of its path of forthcoming swinging movement, by way of the depression of the left-hand end of fountain-carrier 84 (Fig. 8). This latter is effected, as described, by corners or angles 97 of vertical above six operations flanges 18 of tripper 17 (Fig. 6), which move pins 94, mounted on support or carrier 84 (Fig. 8), so that the latter is swung down on its hinge 86. The inker is held in this retracted position during the further depression of tripper 1'? and until the latter, after the printing operation, is moved back toward its normal position. This maintenance of the inker in its withdrawn position is effected by the holding of pins 94 in tripper-slot 96 and by slide98 to be described (Fig. 6).

(2) Immediately after the withdrawal of the inker from color type 49, the latter is swung upward with its pivot-shaft 39 by the engagement of heads 70 of plungers 67 with pressure members 59. The latter thereby are depressed against their springs 64, 65. At any desired time after the be inning of downward movement of members 59 (depending on the rigidity of springs 64, 65, Fig. 5, which cushion the blow of the impression surface on the tripper), the downward movement commences of the righthand ends of levers 56 and of crank pins 54; (Fig. 6), whereby type-carrier 38 is swung against its spring 11 to move color type 49 to its position of rest in the printing location of the type at type level of the press (Fig. 1). In this operation, the downard movement 0 tripper 17 is amplified (permissively several times) by the mechanical lever arm which exists between crank pins -1 and the points of engagement of the tripper with plungers 67. Normally, crank pins 54 6) are at an angle of about fifty degrees above horizontal; but in the swing to printing position they are moved through an angle of ninety degrees. This amplifying arrangement is similar in this respect to that of the levers 27 of the chase of my said prior patent.

(3) Then follows the complete depression of tripper 1'7 by the previously-commenced engagement of the impression surface of the press with a side or end of the frame of the tripper itself. This acts against springs 64:, 65 and (or) spring 41, to hold color-type 4-9 at rest in its printing position and (by the provision of the lost motion.) to ensure the color-type reaching a position of rest in printing position before the completion of the downward movement of the tripper.

(4:) Then the impression surface of the pre comes into printing relation with color type while the latter is held at rest in printing position (Fig. 1).

(5) Then the impression surface leaves the chase. As soon as this occurs, tripper 17 is free to be moved back (together with levers to its normal position extending above type level of the press, by means of the spring arrangement. Thus, spring 41 Fig. 8) forces type-carrier 38 back to normal (inking) position and holds it at rest thereat; also, via crank pin 54;, the righthand ends of levers 56 are moved upward by spring 11 (Figs. 8, 5), so that they are restored to normal position.

(6) The swinging of the color-inker against the color type at rest ininking position (Fig. 8) is effected as follows. Almost at the end of the upward movement of tripper 17, its shoulder-corners 97 (Fig. 6) are raised high enough to permit hiker-springs (Fig. 8) to force pins 9a into the bottom portion of slot 96 of the tripper (Fig. 6), whereby inking pad 78 is swung by springs 90 against color type 49 to the position of rest of the latter. The arrangement of shouldencorners 97 is such that springs 90 are not permitted to move the inker until tripper 17 has substantially reached its normal elevated position. The construction may be such (as a suitable yielding composition of pad 7 8, or otherwise) that the chase will be operative even if, on return to normal relations of Fig. 6, the returning-springs cause the movement of the pad to a position of rest in its normal printer-inking location, prior to the swing-back of the color printer across part of the space occupied by the pad in such normal location. But positivelyacting means may be provided, and preferably are provided, to ensure against premature action of said springs 90 (Fig. 8) in moving pad 78 to its inking position, i. e., to prevent such action until after color type 19 has been swung down beyond a point where it might make moving contact with the pad which might injure the inker or the type, or both. As type 49 is swung down, a corner of it will cross the space occupied by pad 78 when at rest in normal inking position. At first that corner of the type member, in swinging through its arc, will move toward the pad, but at a certain point in its swing it will begin to move away from the pad, the latter movement being just before the type reaches its position of rest. Therefore it is desirable that the pad should not reach said point until the corner of the printer starts its movement toward final inking position and away from the pad, whereupon both the pad and said type corner move in the same general direction, i. e., toward their normal (inking) positions of Fig. 8. In order thus to hold the pad, springs 90 (Fig. 8) may be prevented from prematurely moving the pad to inking position. Slot 96 of tripper-flange 18 (Fig. 6) may be formed, as shown, between said flange itself and a sliding latch 98 supported by tongue 99 having freedom for lateral sliding motion in the slot shown in flange 18. Latch 98 is formed with a pivoted tooth 101 bearing against a flattened portion of the periphery of disk 53, and normally extending over tooth 102 of said disk and held down on latch 98 by the spring 103. In the normal (inking) relations shown in W1 0, pin 9 1 is in position where it has moved par. 78 against color type 49 (l 8) on the spring-return movement from the printing position or the color type. Upon the move-- ment from normal (inking) relations to printing position, as tripper 17 is moved down by the impression surface or" the press, pin 9 1, in being pushed to the left (Fig. 6), slides latch 98 and to the left, thereby with drawing tooth 101 from shoulder 102; pivoted tooth 101 swin ing upward against spring 103 to permit the slight downward component of the motion of latch 98. (This permits the above-described clockwise motion of crank-disk 53 and crank-pin After this action, tooth 101 carried directly downward with tripper 17 and its flange 18 (tooth 101 departing entirely from contact wi h the periphery of oscillating disk 53 and being moved by spring 103 down to normal position). Later, upon the springre irn of all the parts to normal relations of Fig. 6, tripper 17 starts to pull up tooth 101 before pin 9% has passed to the right of corner 97; and meanwhile disk 53 is being swung counter clockwise to its normal position of Fig. 6. The result is that just as disk 53 and tripper 17 are coming to rest, and when pin 94 has passed under corner 97, teeth 101 and 102 come into their vertical relations shown in Fig. 6, so that pin 9% under impulsion of springs 90 (Fig. 8) forces latch 08 to the right and causes engagement of tooth 101 above tooth 102. Said motion of pin 94- to the right is that which carries pad 78 to its normal (inking) position; but that motion is not permitted while tooth 101 is prevented by the periphery o1 disk 53 from movement to the right 6), for latch 98 is held in position to prevent pin 94: from moving to the right even if corner 97 of the tripper has been moved above the position of pin 9 in slot 90. The design is such that latch 98 is not permitted to move to the right until color type 19 has come to rest in inking position; the return movement of pad 78 taking place just at the instant that tripper 17 is reaching its normal position above type level and just as disk 53 is reaching its position of rest as shown. Thus it is made impossible for pad 78 to reach its inking position prior to the time that color type 19 has been swung thereto. Preferably the design of the parts shown is such that tooth 101 cannot be snapped over tooth 102 until the corner or" type 1-9, which crosses the space occupied by pad 78 when in its inking position, has begun its move ment away from and with the pad toward their inking positions.

By the above construction and arrangement, the oscillating color type is not permitted to be swung to or from the felt inking pad while these two members are in engagement with one another, for such swing iug movement on pivot-shaft 39 would cause type 410 to into and rub against the pad and result not only in injury to or undue wear on tl cad in the inking ot the depressions the type but would also result 7 i of type itsel provisions in this improved chase the ope" ction oi ie tripper by the sion surn. .e of the press alone conall the operations of the chase, and whereby the color-miter, normally in contact with the color-printer, is moved away from it before the comm ncement the swinging the color-printer to printing position, and ward the colorq nter after the latter has inking p sition, are of great .LctllCC in that they permit ions, including the inking and c a g the color rmter, to be co- .rdinated and tined for the best effect indezently of the construction or" the press its and also pe" it reduction in the number of moving s. These features also prevent the i ,i the inking pad (by its normal covering by type 49) and prevent wearing of pad ane ype by moving contact with one another. These features, therefore, are those of most n'iarked improvement upon the chase of my said prior patent, wherein the color-inking was effected by the operation the inking roller of the press in combination with a special movable arrangement f the black type of the chase, and wherein the best possible operation was not secured by a timely complete separation of the color-inker and color-printer.

The disclosed embodiment of the invention is designed particularly for use in printing presses employing a cylindrical impression surface including reciprocating flat bed presses wherein separate sheets of paper are printed, and including also stationary flat bed presses of the web type wherein. the paper is fed from a roll. in all such cases, the paper is printed while it is on an impression surface which is cylindrical. It is such cylinder which operates my chase upon its engagement with any one of the four top sides of tripper frame 17. The disclosed embodiment is specially designed for such types of presses, by virtue or the design of the tripper in the form of the multi-sided frame 17 (or at least in a form having one or more of such. sides), and by the provision of the equalizing devices in combination with any such tripper and by the short height of tripper above type level, and by the corre sponding desi n in olving the various re- (including the spring arrangeto the movement of the movable The entire operation of swinging the ating color type to printing position is effected by the engagement of the impresesse sion cylinder of the press with one side of tripper frame 17. In this operation, a part of the color type swings above printing position across the path of theimpression'cyL inder. of the press. In t the above stated types of presses, there is time for th'e'color type of my chase to be swung out of such path and to a condition of rest in printing position, prior to the instant when the ims pression cylinder reaches printing position over the chase. In fact, before the impression cylinder has reached the color type, it has not only swung the latter to printing. position but thereafter has further depressed tripper 17 to further compress the springs. Thus the color type is. brought to restin printing position before the impression cyl inder has reached it. I provide an extent of downward movement of tripper 17 which is a little more than necessary to bring the color type to printing position, in order to ensure that the color type shall be at rest in printing position and out of that part of its swing which crosses the path of the impression cylinder, before the latter has reached that point. In the use of my chase with the above-stated types of presses, there is no necessity for hurrying the color type to printing position (for the reason stated above) and therefore noneed of any greater height of tripper 17 normally above type level than that shown. Furthermore, in those of the above-stated types of presses in which the impression cylinder is elevated between times of printing, such elevation is only a small fractionof an inch; therefore the disclosed short height of the tripper is advantageous in the use of the chase with such presses, in order to prevent contact with the impression cylinder, when the lat ter passes over printing position without being depressed for printing operation.

My invention, however, is useful, not only with the above types of presses, but also with job presses having a stationary bed and a flat impression surface or platen between which separate sheets of paper are printed, provided that tripper 17 is given such additional normal height above type level that the oscillating color type is given time to swing completelyacross and out of the path of the platen which is depressing the tripper, before the platen reaches the type, thereby preventing the type from being engaged by the paper onthe platen while the type is in swinging transit toward but above its printing position. In cases of use with such flat platen presses, as well as in use with the other stated types, the spring arrangement should be designed so that after the color type has reached printing position, the tripper may continue to yield to the platen. But in the case of the job presses with movable fiat platens, where the platen moves as plane toward the plane of the type, there will be no pan ticular object in designing the tripper to have the frame form shown he'rein,'or even to have one or more sides disposed horizontally above type level. In fact, as each such top sideor edge itself prints at least a line or series ofdot-s, anysuclrframe form of the tripper might be positively undesirable in such cases, in which case the tripper may be designed to have any form or arrangement suitable for operation by such flat platen, as a single button or pair of small buttons having minin'ium printing surfaces or located outside of the area of the sheets of paper being printed. On the other hand, in any case of apress having a cylindrical impression surface,the design of the tripper in the form of frame 17 hereof is advantageous in that it permits the location of my chase in the bed irrespective of which side of such frame is first presented to the'action of the impression cylinder; but in designing a form adapted to permit the impression cylinder to engage the side of the tripper frame which lies adjacent the swinging color-printer, care should betaken to allow ample distance between such tripperside and the color-printer, so that the latter will have been swung out of the path of the cylinder before the latter reaches it. When the tripper is in the form of a frame or extends over considerable area (more or less, as shown), there is no reason why it may not be designed to afford as much black-printing surface as desired without limitation to the edges 20 (Fig. l) which are engaged by the impression surface. As a single illustration, it would be possible within my inventions to design the tripperframe to extend through the space occupied herein by blacl type holder 24 so that the I tripper itself might carry thedtype (or an electrotype) now shown in holder 24:; the tripper in such case, however, being entirely free as usual for its functional depression by the impression surface, and the type itself beings-o disposed that it will have reached its position of rest before the type carried by it is engaged by the impression surface. lVith such an'arrangement, an advertiser can have an electrotype of standard wording for use on the tripper, surrounding the color-type-, and the wording of the latter could be changed from time to tintie by the printer at the direct-ionfof the advertiser. In my type of chase, the location of the color-inker adjacent and parallel with the oscillating color-printer, provides a space above any inker of 'adequatecapacity, which space most usefully can be uti lized to contain type to be inked by the inkroller of the press; and while :I do not claim herein to be the originator of any features suggested in this paragraph, yet I consider that any such modifications are within the scope of my inventions of my type of chase.

Furthermore, there are various features of my inventions which are not limited tocombination with various other features, notwithstanding that in a given embodiment, one of such features may be usefully cooperative with another of such features. As an example of this, the inking surface of the color-inker need not be in the form of a non-rotating pad, but might comprise an inking roll constructed and arranged in a manner similar to that of the inking roll of the press itself. Many other departures may be made within the scope of my inventions, not only as to details but also as to principal features, from the particular embodiment shown herein; and while I do not herein claim originality for any such modifications, yet many of them may be within the scope of my inventions and therefore my claims are intended to be interpreted accordingly.

I claim 1. A chromatic chase for printing presses which comprises a color-printermounted to oscillate to and fro through a quarter-revolution from a normal vertical inking position below type level of the press to a horizontal printing position at type level; a color-inker located adjacent the colorprinter and mounted to be movable from normal position in contact therewith; a tripper constructed normally to project above type level in the path of the impression surface of the press; connecting means between the tripper and the color-inker arranged to cause the inker to be moved away from the printer upon the depression of the tripper; and connecting means between the tripper and color-printer arranged to cause the printer to be swung from inking to printing position upon the depression of the tripper.

2. A chromatic chase for printing presses which comprisesa main frame; a colorprinter mounted in said frame to oscillate to and fro through a quarter-revolution from a normal vertical inking position to a horizontal printing position at type level of the press; a color-inker mounted in said frame adjacent the color-printer and movable from normal position in contact with said printer; a tripper mounted in said frame and normally projecting above the same and above type level in the path of the impression surface of the press; connecting means between the tripper and the color-inker and arranged to cause depression of the tripper tomove the inkerv away from the printer; and connecting means between the tripper and color-printer and arranged to cause the depression of the tripper to swing the printer from inking to printing position.

3. A chromatic chase for printing presses which comprises a color-printer mounted to oscillate to and fro through a quarterrevolution from a normal vertical inking position below type level of the press to a horizontal printing position at type level; a color-inker located adjacent the colorprinter and mounted to be movable from normal position in contact therewith; a tripper constructed normally to project above type level in the path of the impression surface of the press; and mechanism connected between the tripper on one hand and the printer and inker on the other, and arranged to cause, successively, upon the depression of the tripper, the movement of the inker away from the printer, and the swinging of the printer to printing position.

l. A chromatic chase for printing presses which comprises a color-printer mounted to oscillate to and fro: through a quarterrevolution from a normal vertical inking position below type level of the press to a horizontal printing position at type level; a color-inker located adjacent the colorprinter and mounted to be movable from normal position in contact therewith; a trip per constructed normally to project above type level in the path of the impression surface of the press; connecting means with the tripper whereby its initial downward movement moves the color-inker away from the printer; and connecting means where by the further downward movement of the tripper moves the printer to printing position.

5. A chromatic chase for printing presses which comprises a color-printer mounted to oscillate to and fro through a quarterrevolution from a normal vertical inking position below type level of the press to a horizontal printing position at type level; a color-inker located adjacent the colorprinter and mounted to be movable from normal position in contact therewith; a tripper constructed normally to project above type level in the path of the impression surface of the press; and mechanism constructed and arranged to cause, successively, upon the depression of the tripper, the movement of the inker away from the printer and the swinging of the printer to printing position, andto cause, upon withdrawal of the depressing force on the tripper, the successive return of printer and inker to normal positions.

6. A chromatic chase for printing presses which comprises a color-printer mounted to oscillate to and fro through a quarterrevolution from a normal vertical inking position below type level of the press to a horizontal printing position at type level; a color-inker located adjacent the colorprinter andmountedto be movable from normal position in contact therewith; a tripper constructed normally to project above type level in the path of the impression su r-' face of the press; springs arranged to tend a to hold the printer and inker in their norinker successively to their inking positions 7. A chromatic chase forprinting machines which comprises a color-inker located below type level, and mounted to be movable from a normal (inking) position; a colorprinter pivoted adjacent the color-inker to be oscillated from normal (inking) position in contact with the inker to printing position and back to inking position; a tripper mounted to be reciprocable from and to normal position above type level of the press in the path of the impression surface thereof; mechanism connected with the color-inker and constructed and arranged to be operated by the initial movement of the tripper from normal (high) position to move the inker from normal (inking) position, and during the final return movement of the tripper to normal (high) position to effect the return of the inker to normal (inking) position and tend to hold it thereat; and mechanism connected with the color-printer and constructed and arranged to be operated by the continued movement of the tripper toward abnormal (low) position after the movement of the inker from inking position, to swing the printer from normal (inking) position to printing position and during the movement of the tripper from abnormal (low) position to swing the printer back from printing position to normal (inking) position and tend to hold it thereat.

8. A chromatic chase for printing machines, which comprises a color-inker located below type level, and mounted to be movable from and to normal (inking) position below type level; a color-printer pivoted adjacent the color-inker to be oscillated from normal (inking) position to printing position and back to inking position; a tripper mounted to be reciprocable from and to normal position above type level of the press in the path of the impression surface thereof mechanism constructed and arranged to be operated by the initial downward movement of the tripper from' normal (high) position to move the inkerfrom normal (inking) position; mechanism constructed and arranged to, be operative by the continued downward movement of the tripper toward abnormal (low) position to swing the printer from normal (inking) position to printing position;;, resilientmeans constructed and arranged to effect simultane: ously the swinging of the printer from printing position back toward normal (inking) position and to lift the tripper toward normal (high) position; and resilient means arranged to effect simultaneously the move? ment of the inker back toward normal (inking) position and to continuethe movement of the tripper back towards normal (high) position.

' 9. A chromatic chase for printing machines, which comprises a color-inker located below type level, and mounted to be movable from normal (inking) position; a color-printer pivoted adjacent the colorinker to be oscillated from normal (inking) position in contact with the inker to printing position and back to inking position; a tripper mounted to be reciprocable from and to normal position above type level in the press in the path of the impression surface thereof; yielding means constructed and arranged to tend to.- maintain said three elements in normal positions; and mechanism controlled by said tripper whereby, upon the depression of the tripper, first the printer and the inking surface of the inker are separated sufiiciently to free the path of oscillation of the printer from the presence of the inker, and then and only then the printer is swung to printing position.

10'. A chromatic chase for printing presses, which comprises a pivoted colorprinter and a color-inker located adjacent it, and normally contacting therewith; a trip per arranged to be operated by the impression surface of the printing press; means connected with the tripper for moving the inking surface of the inker directly away from the printer; additional means con nected with the tripper for swinging the printer to printing position; spring means compressed by the tripper and operating after the tripper is released from the impression surface of the press, for swinging the printer from printing position back to inking position; and spring means compressed by the tripper and operating after the tripper is released from the impression surface of the press, for moving the inker back into contact with the printer.

11. A chromatic chase for printing presses, which comprises a pivoted C0101? printer; a color-inker located adjacent it; a tripper arranged to be operated by the impression surface of the printing press; and mechanism operating between the tripper on one hand and the inker and printer respectively 'on the other hand, whereby the movement of the tripper successively first separates the inker and printer and then moves the printer to printing position.

12. A chromatic chase for printing presses which comprises a pivoted color-printer, a

color inker normally inking the printer; a tripper arranged to be operated by the impression surface of the printing press; and mechanism constructed and arranged to be operated by the tripper first to move the inking surface of the inker directly away from the printer and then to move the printer to printing position.

13. A chromatic chase for printing presses which comprises a colar-printer mounted to oscillate to and fro from a normal inking position below type level of the press to a horizontal printing position at type level; a color-inker located adjacent the color-printer and mounted to be movable from normal position in contact therewith and out of the path of movement thereof; a tripper constructed normally to project above type level in the path of the impression surface of the press; connecting means between the tripper and the color-inker arranged to cause the inker to be moved away from and out of the path of movement of the printer upon the depression of the tripper; and connecting means between the tripper and color-printer arranged to cause the printer to be swung from inking to printing position upon the depression of the tripper after said withdrawal of the inker.

14. A chromatic vchase for printing presses which comprises a main frame; a color-printer mounted in said frame to es cillate to and fro from a normal inking position to a horizontal printing position at type level of the press; a color-inker mounted in said frame adjacent the color-printer and movable from normal position in contact with said printer to a position out of the path of movement of the printer; a tripper mounted in said frame and normally projecting above the sameand above type level in the path of the impression surface of the press; connecting means between the tripper and the color-inker and arranged to cause depression of the tripper to move the inker away from the printer and out of its path of movement; and connecting means between the tripper and color-printer and arranged to cause the depression of the tripper to swing the printer from inking to printing position after said withdrawal of the inker.

15. A chromatic chase for printing presses which comprises a color-printer mounted to oscillate to and fro from a normal inking position below type level of the press toa horizontal printing position at type level; a color-inker located adjacent the color-printer and mounted to be movable from normal position in contact with the color-printer and out of the path of movement thereof; a tripper constructed normally to project above type level in the path of the impression surface of the press; and mechanism connected between the tripper on one hand and the printer and inker on the other, and

arranged to cause, successively, upon the depression of the tripper, the movement of the inker away from the printer out of its path of movement, and the swinging of the printer to printing position.

16. A chromatic chase for printing presses which comprises a color-printer mounted to oscillate to'and fro from a normal inking position below type level of the press to a horizontal printing position at type level; a color-inker located adjacent the color-printer and mounted to be movable from normal position in contact with the color-printer and out of the path of movement thereof; a tripper constructed normally to project above type level in the path of the impression surface of the press; connecting means with the tripper whereby its initial downward movement moves the color-inker away from the printer and out of its path of movement; and connecting means whereby the further downward movement of the tripper moves the printer to printing position.

17. A chroma-tic chase for printing presses which comprises a color-printer mounted to oscillate to and fro from a normal inking position below type level of the press to a horizontal printing position at'type level; a color-inker located adjacent the colorprinter and mounted to be movable from normal position in contact therewith and out of the path of movement thereof; a tripper constructed normally to project above type level in the path of the impression surface of the press; and mechanism constructed and arranged to cause, successively, upon the depression of the tripper, the movement of the inker away from the printer out of the path of movement thereof, and the swinging of the printer to printing position, and to cause, upon withdrawal of the depressing'force on the tripper, the successive return of printer and inker to normal positions.

18. A chromatic chasefor printing presses which comprises a color-printer mounted to oscillate to and fro from a normal inking position below type level of the press to a horizontal printing position at type level; a color-inker located adjacent the colorprinter and mounted to be movable from.

normal position in contact therewith and out of the path of movement thereof; a

tripper constructed normally to project above type level in the path of the impression surface of the press; springs arranged to tend to hold the printer and inker in store energy in said springs, and to cause the springs to operate the mechanism to return the printer and inker successively to their inking positions. V

19. A chromatic chase for printing machines, which comp-rises a color-printer and a color-inker mounted adjacent to one another; a tripper arranged to be depressed by the impression surface of the press; mechanism connected to the tripper and operated by the initial depression thereof to separate the inker and printer prior to movement of the printer to printing position of rest; mechanism connected to the tripper and operated by further depression thereof to move the printer to its printing position of rest; and spring means combined with the tripper and arranged to permit further and idle depression thereof after the printer has reached its printing position of rest.

20. A chromatic chase for printing machines, which comprises an independently movable color printer and color inker; a tripper arranged to be depressed by the impression surface of the press; mechanical connections between the tripper and the printer and inker respectively, and arranged to cause the tripper in its successive stages of depression first to move the inker away from the printer and then move the printer to printing position; spring means com bined With the tripper to permit further depression of the tripper after the printer has reached printing position; and spring means compressed by the depression of the tripper and operating upon tl 1e release 0 t the tripper from the impression surface of the press to cause the repetition in reverse order of the above specified movements of the printer and inker.

JOHN A. WHITTINGTON. 

